Second what the two professionals stated above. We have done a few TR members here with TONS of add ons. Most all of them have ended up with different situations after the months and years have gone by. If you search alarms threads in this section, we did one for a member on here I believe eight different add ons about 8 months ago or so. When we called Directed tech support to find out how to daisy chain that many sensors, they said they didn't know-no one had ever done that many sensors. Then they suggested we didn't do it as it would lead to false alarms!

We got it done anyway over two days period of time after allot of testing and adjusting however and for the most part, everything has been pretty good except his battery/siren that he purchased on eBay was dead in a few weeks (they don't have much shelf life and he was sent a pretty old one). We replaced it with an "A" stock piece from here and have had zero problems since.

The Python is a good choice though. Made by Directed it has a full lifetime warranty as long as it was purchased/installed through an authorized dealer.